The address belongs to a dubious search engine that presents users with results taken from the legitimate Yahoo engine. There is nothing inherently wrong with this behavior. However, the problems start to crop up, when you take into account the methods used by to generate traffic, mainly that it uses browser hijacker applications.

Browser hijackers and all other PUPs aim to infiltrate the users' computers and devices without being noticed. They employ various deceptive distribution methods such as bundling or hiding inside fake software installers and updates. If users don't pay enough attention when installing programs taken from unproven sources, they may not even realize that one or more intruder apps have also been delivered to their computers. 

The browser hijacker tasked with promoting could modify several browser settings to achieve its goal. Usually, these include the homepage, new tab page, and the default search engine. Afterward, nearly all actions of the user will result in artificial traffic towards the promoted address, such as launching the browser, starting a new tab or initiating a search via the URL bar.

Alongside their more obvious activities, PUPs also may be collecting various information about the user's browsing activities. Data such as the entire browsing history, search history, all clicked links, IP address, geolocation, ISP, and more, could be transmitted to a server controlled by the specific PUP's operators.